b) Developing an appropriate charging/discharging control strategy/system for Receiver in a solar field.
c) Re-engineering the collector cell to achieve better heat transfer with the circulating HTF or developing heat transfer enhancement mechanisms in the receiver in order to achieve this.
Let me refer to some valuable conference paper as a starting point. It is available for download at the website::
Conference Paper: Modeling and Analysis of a CSP Plant Technology for Small Power Networks -Technical and Financial Evaluation Inno Davidson, Nicky Mbaimbai
Its a deep and complicated question;
1. For the first part of the question, I think it involves finding the optimum charging time of the fluid in the solar field in the day time and discharge it in the non-solar time (night), to reduce the heat losses in the solar field and to decrease the energy required for freeze protection temperature of the working fluid especially if you use the kind of fluids with high temperature range such as solar molten salt.
2. For the second part of your question, as I think its based on two main points:
A. Optimize the dimension of your receiver or using baffles inside the receiver to enhance the convective heat transfer between the inner wall of the receiver and the fluid.
B. Or using different kind of fluids with high a heat transfer coefficient such as oils, salts or even nano-fluids.
Dear Onyebuchi
Probably best to use one of the computer modelling platforms to model the system and then work on you optimization.
http://www.nrel.gov/csp/troughnet/models_tools.html
There is a range of tools vailable on the link below, we use TrnSys for thermodynamic modelling of parabolic dish receiver and Stirling engine modelling.
regards
Gerro
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